name_list = ["赵", "钱", "孙", "李", "周", "吴", "郑", "王"]
print(name_list)
print('-'*50)

#查
print(name_list[3])
print(name_list.index('周'))
print('-'*50)

#改
name_list[1] = "钟"
print(name_list)
print('-'*50)

#增
name_list.append("朱" )
name_list.insert(2, "刘")
temp_list = ["沈", "童", "尹"]
name_list.extend(temp_list)
print(name_list)
print('-'*50)

#删
name_list.remove("孙")
name_list.pop(5)
del name_list[1]
print(name_list)